Is the bansuri used in folk music?

Yes, the bansuri remains a folk instrument as well as a classical one. A five-hole bamboo bansuri from Rajasthan, 210 mm long and collected in 1987 for a Cambridge museum, is played at seasonal dances and at Holi. In Assam the murali serves dance and song in several communities, and a Horniman example is made of bijuli bamboo. Museums file both as side-blown flutes.